The first two cases of the highly contagious virus were reported on May 26.

Measles is a highly contagious, vaccine-preventable viral illness and symptoms can appear up to 21 days after exposure.

Symptoms include fever, red, watery eyes, cough and runny nose and is followed by a rash that is red, raised, and blotchy. The rash begins on the face at the hairline and moves down the body and may last five to six days.

Case counts are updated daily by the Arizona Department of Health Services.